Fish Farms from Space: The Ground Truth from Google Earth

The Great Wall of China is not the only thing you can see from space. Fish farming cages are clearly visible through Google Earth’s satellite images and University of British Columbia researchers have used them to estimate the amount of fish being cultivated in the Mediterranean.

The study, published yesterday in the online journal PLoS ONE, is the first to estimate seafood production using satellite imagery.

“Our colleagues have repeatedly shown that accurate reporting of wild-caught fish has been a problem, and we wondered whether there might be similar issues for fish farming,” says lead author Pablo Trujillo, an Oceans Science Advisor for Greenpeace International, who conducted the study while a research assistant at the UBC Fisheries Centre.

“We chose the Mediterranean because it had excellent satellite coverage and because it was of personal interest,” says Chiara Piroddi, co-author and an ecosystem modeler at the UBC Fisheries Centre. “We hand counted 20,976 finfish cages and 248 tuna cages, which you can differentiate due to their extremely large size – each tuna cage measured at more than 40 metres across.”

Almost half the cages were located off the coast of Greece and nearly one-third off of Turkey – and both countries appear to underreport their farmed fish production. The researchers note that not all areas had full satellite coverage – for instance, images were missing for large portions of the coasts of France and Israel, for reasons the authors do not fully understand.

Combining cage counts with available information on cage volume, fish density, harvest rates, and seasonal capacity, the research team estimated ocean finfish production for 16 Mediterranean countries at 225,736 tonnes (excluding tuna). The estimate corresponded with government reports for the region, suggesting that, while there are discrepancies at the level of individual countries, overall, the Mediterranean countries are giving accurate counts.

“The results are reassuring, and the methods are inspiring,” says co-author Jennifer Jacquet, a post-doctoral researcher with UBC’s Sea Around Us Project. “This shows the promise of Google Earth for collecting and verifying data, which means a few trained scientists can use a freely available program to fact-check governments and other large institutions.”

Trujillo adds that Google Earth, with its high-resolution images and consistent time series, can be a powerful tool for scientists and non-governmental organizations to monitor activities related to ocean zoning and capture fisheries.

See some coverage of the work at The Scientist.

Krista Greer – Research Assistant

Krista is a from a small town in Ontario, Canada. While her initial undergraduate focus was Biological Anthropology, she found that her long-time interests in marine conservation could not be suppressed. As such, she went on to study Marine Biology and Zoology at James Cook University in Australia. Throughout her undergraduate years, Krista had the opportunity to participate in field work all over the world including Costa Rica, Kenya, Seychelles and Borneo. In September 2011, she arrived at the University of British Columbia to do her Masters under the supervision of Dr. Daniel Pauly. Her thesis focused on the carbon emissions of the world’s fishing fleets since 1950 and what the “true” cost of fishing is when its environmental impacts are adequately considered. She now works as a research assistant on fishing effort and CO2 databases.

Outside of her research, Krista loves to read and participate in outdoor activities. In particular she enjoys scuba diving, camping, beach walking and spending time with her dog, Nelly.

Kyrstn Zylich – Research Assistant

Kyrstn completed her BSc in Biology at the University of British Columbia. Although unsure of where her degree would take her, the ocean had always held a specially place in her heart. Growing up only an hour away from Vancouver allowed for numerous trips to the aquarium which helped instill a curiosity of marine organisms. As well, she has enjoying several family vacations to Hawaii which included snorkeling with turtles and other incredible sea life. After joining the Sea Around Us Project as a volunteer in February of 2011 she completed her first reconstruction on the island of Tokelau. Once joining the project fulltime as a staff member later that year, she has continued working on catch reconstructions, focusing mainly on South Pacific island countries.

The fishers of Jamaica are making change mon!

This is an article by Sea Around Us researcher Stephanie Lingard, and also appeared in the September/October newsletter.

Jamaica, the land of wood and water, famous for its warm people, reggae music, jerk chicken and overfished reefs. Jamaica lives up to its reputation in every aspect. The people are some of the kindest, warmest and funniest you could hope to meet in your life. The landscape is an impossibly beautiful green, the food is flavourful, and… the reefs are desolate. However, there are many reasons to expect a better future for Jamaica’s fishers and fishes.

During the winter of 2010 and spring of 2011 I was given the opportunity to live in Jamaica on an internship funded by the Canadian International Development Agency (CIDA). Having worked at the Fisheries Centre for the summer of 2010, I was delighted to find I would be working alongside the Fisheries Division of Jamaica’s Ministry of Fisheries and Agriculture. I was working with an initiative called Improving Jamaica’s Agricultural Productivity Project (IJAPP). The fisheries aspect of the project, funded in part by CIDA, had three focus points: market facilities, enhancement of fisheries resources through artificial reefs, and capacity building with fishers in six south coast fishing villages. The project also worked to establish co-management bodies within each of the fishing villages. These bodies would be responsible for managing the new markets, and community organization tasks. Capacity building included workshops concerning all aspects of life: money management, conflict resolution, ecological knowledge, fisheries management, and safety at sea, to name a few. During the workshops, fishers faces lit up, and they absorbed the information eagerly. Community members were deeply thankful to have the opportunity to learn how they could care for their resources and improve their livelihoods. Working with fishers during workshops was by far the most rewarding aspect of my time there, and I’m happy to report: progress is being made.

A long list of challenges is faced by the ecosystems of Jamaica: invasive lionfish, pollution, overfishing, destructive fishing habits, lack of regulation, hurricanes, and coral disease. Initially, working among these challenges made it difficult to stay positive and understand why we were building fish markets while previously donated gear sheds, from the European Union, sat unused. Why were new reefs, sure to be targeted by destructive fishing practices, being built? In my mind, enforcement of fish sanctuaries (MPAs), and other regulations were clearly a priority. I often asked myself what the solution was to the myriad of problems, often feeling like I had nothing to offer the fishers or the fish.

Then, as time went on, my attitude changed. The more I became involved with the fishing community, and after meeting fishers and fisheries officers, I felt things, like my attitude, could be changed. The fishers themselves provided inspiration. Despite hauling up empty pots (Antillean Z traps) day after day, they continued to smile and laugh. At community meetings hosted by the project, many fishers were outspoken with other community members about the need to stop dynamite fishing, and other destructive practices. Many fishers I spoke with also expressed that, while they may not see the benefits of their changed behaviour, it was important to keep working at it for the next generation of fishers. The fisheries division staff, Dr. Karl Aiken (the Jamaican fish expert with the University of the West Indies), and members of local NGOs provided constant inspiration as well. All of these dedicated people have worked for years amongst funding cuts, broken government promises, destructive fishers, and natural disasters, and yet they persist in good spirits.

My friend Nakhle Hado, who works with Food for the Poor, teaches lionfish handling workshops around the island. He works tirelessly with fishers to teach them less destructive fishing techniques (like deep water handlining vs. trap fishing), as well as encouraging them to catch lionfish. Along side this work, he promotes a market for lionfish by selling it on the menu of his family’s restaurant in Kingston. The fried lionfish is amazing! The trend appears to be catching on as I had several fishers tell me they prefer lionfish to other types of fish, and that they have customers who will come to them specifically for the prickly fish. In time, it may just become a Jamaican delicacy.

The Nature Conservancy is currently working with the Fisheries Division to set up enforcement of the Pedro Bank Fish Sanctuary. Pedro Banks is a large fishing ground with several small sandy cays which host a transient community of fishers approximately 60 km off the south coast of Jamaica. Although funding is slow to come through, all are hopeful this will commence before the end of this year, or in early 2012.

The Oracabessa Fish Sanctuary was finally launched on October 9, 2011, Dr. Aiken giving me the good news. There is a wonderfully dedicated group of local NGOs working to get the rest of the 8 designated fish sanctuaries off the ground: Caribbean Coastal Areas Management Foundation, Blue Fields Bay Fishermen’s Friendly Society, St. Mary Fishermen’s Cooperative, Oracabessa Foundation, The Negril Coral Reef Preservation Society, The Montego Bay Marine Park Trust, Fisheries Division, Alloah fisher group and Business Community.

Despite several decades of hardships, and slow-moving political action, there is a strong community of fish-friendly organizations and individuals in Jamaica. I hope the return of the herbivorous long-spined sea-urchin (Diadema antillarum), combined with the much anticipated launch of the fish sanctuaries, and a burgeoning lionfish market signal a recovery of Jamaica’s marine resources.

New Study Published in MEPS about Marine Predator Declines

Iconic marine predators such as sharks, tunas, swordfish, and marlins are becoming increasingly rare under current fishing trends, according to a new study published in the journal Marine Ecological progress Series. In half of the North Atlantic and North Pacific waters under national jurisdiction, fishing has led to a 90-per-cent decrease in top predators since the 1950s, and the impacts are now headed south of the Equator. The study was lead authored by former Sea Around Us Project M.Sc student Laura Tremblay-Boyer. The study is available here and the press release is here.

Analysis of FAO Report on Fisheries Statistics

Global fisheries statistics must be viewed with a critical eye. Fisheries landings data are collated by FAO and contributed by all member countries, which have varying resources and motives. In a new paper recently published in Marine Policy, Daniel Pauly and Rainier Froese take a close look at FAO’s State of the Worlds Fisheries and Aquaculture’ (SOFIA) report from 2010 and discuss the FAO’s history, as well as the implications, imperfections, and possible improvements to be made to fisheries data.

Pauly and Froese are both complimentary and critical. They point out the misleading use of the word ‘stability’ in the report as it refers to global catch data from 2005-2008, and point out that even if that global catches are indeed stable, fishing effort is rapidly expanding. They note the FAO’s acceptance of scientific data that showed China does not know how much its fisheries catch, and the large degrees of uncertainty around global trends this problem creates. Pauly and Froese point approvingly to SOFIA’s position on assemblage overfishing and their statement: ‘ We do not disagree that a general decline in mean trophic level of marine landings is likely to have occurred in many regions.’ Finally, Pauly and Froese call for cooperation between institutions, e.g., U.N. technical organization and civil society, as represented by universities and non-government organizations, to improve SOFIA reports and potentially the management of fisheries globally.

To read the full article click here.

Citation: Pauly, D. & Froese, R. 2012. Comments on FAO’s State of Fisheries and Aquaculture, or ‘SOFIA 2010’ Marine Policy 36: 746-752.

Climate Change to Further Degrade Fisheries Resources

A new study out this week shows how the effect of climate change can further impact the economic viability of current fisheries practices.

“Fisheries are already providing fewer fish and making less money than they could if we curbed overfishing,” says Rashid Sumaila, principal investigator of the Fisheries Economics Research Unit at UBC, member of the Sea Around Us Project, and lead author of the study. “We could be earning interest, but instead we’re fishing away the capital. Climate change is likely to cause more losses unless we choose to act.”

Partly supported by the Pew Charitable Trusts, National Geographic, the World Bank and U.S. National Oceanic and Atmospheric Administration, the study is a broad view of the impact of climate change on fisheries and their profitability. It was published online this week in the journal Nature Climate Change.

Over the last century the ocean has become warmer and more acidic. Other human-led factors, such as pollution and overfishing, have also been hard on marine species. With ocean warming, many species will move further towards the poles and into deeper water.

While fisheries in a few regions, such as the far north, may benefit from climate change, many other regions, particularly those in the tropics, can expect losses in revenues. Regional examples can help inform what could happen globally. For example, the reduction in landings of pelagic fisheries in Peru as a result of changes in sea surface temperature during the 1997-1998 El Niño event caused more than US$26 million of revenue loss.

“Changes in temperature and ocean chemistry directly affect the physiology, growth, reproduction and distribution of these organisms,” says William Cheung, associated faculty of the Sea Around Us Project. “Fish in warmer waters will probably have a smaller body size, be smaller at first maturity, with higher mortality rates and be caught in different areas. These are important factors when we think of how climate change will impact fisheries.”

“This study provides an early glimpse of how climate change might impact the economics of fishing,” says Sam Herrick, a NOAA scientist and co-author. “We must continue to study how climate change, combined with other factors, will affect marine ecosystems and the productivity of fishery resources.”

Biologically, maintaining more abundant populations can help increase fish’s capacity to adapt to environmental change. Curbing overfishing is crucial to making marine systems more robust and ready for changes that are already underway.

“This study highlights the potential negative impacts of climate change on the profitability of fisheries,” said Vicky Lam, UBC graduate student and co-author. “The next generation of scientists must put more effort on exploring ways to minimize the impacts of climate change.”

Fish stocks will also be more robust to climate change if the combined stresses from overfishing, habitat degradation, pollution runoff, land-use transformation, competing aquatic resource uses and other anthropogenic factors are minimized

“We have to remember that the effect of climate change on the marine environment will occur alongside the impacts on land,” says Daniel Pauly, principal investigator of the Sea Around Us Project and co-author. “It will not be easy to divert resources from one sector to help another sector. This is why a strong governance system is needed – to temper the losses on the sectors that are worst hit.”

“Governments must be anticipatory, rather than reactive,” says Sumaila. “We all need to think more of the future while we act now.”

For more information, see this summary provided by Pew.

Applying Science in Belize: from Taxonomy to Policy

This article was written by research assistant, Sarah Harper, and appears in the July/August 2011 newsletter.

The Sea Around Us project and Oceana team up for a conference to discuss what’s at risk, from a marine biodiversity perspective, if plans go ahead to drill for oil off the coast of Belize. The conference, co-hosted by Daniel Pauly and Deng Palomares, held in Belize City on June 29 and 30th was entitled Too precious to drill: the marine biodiversity of Belize. At the conference marine biologists, taxonomists and economists provided an exhaustive list of reasons the precious and pristine marine environment of Belize could be at risk. With some of the healthiest coral reefs, manatee populations, shark diversity and reef fish spawning aggregations in the Caribbean, Belize would lose a lot from an oil spill1. Tourism and fisheries are particularly at risk as these both rely on a healthy marine environment, and provide jobs, revenue and food to the people of Belize.

Just over a year ago, the International NGO Oceana, which recently opened an office in Belize City, caught wind of plans to develop an offshore oil industry in Belize. Leaked govermnment documents revealed a map of the territorial waters of Belize, a checkerboard of oil exploration consessions. Oceana, the largest international NGO focused solely on ocean conservation, raised the alarm bell and decided that quick action was needed to engage and empower the people of Belize to stand up to the government and protect their precious natural wealth. A campaign was launched with a petition to be signed by the people of Belize demanding a referendum on oil exploration offshore and in protected areas. Oceana met their target with over 10% of the voting population signing the petition (17,000+ signatures), the minimum requirement for a referendum to be called, and continues to raise awareness throughout the country with their colourful campaign bus (see photo) and heavy media engagements.

Further to their in-country efforts to engage the public, Oceana teamed up with the Sea Around Us project to deliver the scientific evidence required for a strong case against offshore drilling in Belize. A conference was set for the end of June 2011 and international scientists selected to share their expertise, including Andrés Cisneros-Montemayor, Dirk Zeller and myself. One of the goals of the conference was to repatriate the knowledge and expertise that had been gleaned from years of scientific study within Belize but that had not necessarily stayed within its borders. Many detailed studies have been conducted on diverse aspects of the Belizean marine environment but have been published abroad. The conference aimed to bring this knowledge back to Belize and use it as a tool to inform and improve decision-making.

Attendance at the two-day conference included fishers, government deligates, the US embasador to Belize, media, NGO’s and citizens of Belize. While the conference was well-attended, the main outlet for disseminating this information to the general public was the media, via breakfast television shows, radio, talk shows, etc.

The conference concluded with a letter to the government of Belize signed by 20 scientists from 10 ten nationaltities and most with years of experience studying the marine environment of Belize. This professional statement re-iterated the importance and value of the marine evironment and the need to protect it from anthropogenic threats, offshore oil drilling in particular.

With the conference concluded, a scientific report just released and a flurry of media exposure, the question remains: to drill or not to drill? The hope is that the government wakes up to an informed public who are now asking the tough questions: who will benefit from offshore oil drilling? Who will pay the price for the high environmental costs associated with this industry?
Perhaps I am biased given my background in marine conservation, but I think that in the waters of Belize, drilling for oil just doesn’t make sense! On the last day of the conference, the scientists and media adventured offshore to Turneffe Atoll, a typical reef for this area known for its excellent diving, snorkeling and sportfishing opportunities. We stopped for lunch at a lodge nestled in amongst the mangroves linning the atoll and heard about the decade long struggle to get the Atoll designated as a marine reserve in order to better preserve its natural beauty. Unfortunately, this Atoll lies within the largest of the oil consessions own by Princess Petroleum Ltd. and likely one of the first areas to be drilled. This Atoll alone brings in 40 million USD annually from flyfishing for bonefish, tarpon and permit. This is money that goes directly into the Belizean economy and to the people of Belize. Conversely, the majority of oil revenue from drilling in the waters adjacent to this popular fishing hole would go mainly to the international investors of the oil companies. Simply looking at the economic picture, drilling for oil would likely not improve the economic situation in Belize and the risk in terms of losses both in fisheries and tourism are huge.

On the biological side, Belize also stands to lose a lot. The conference highlighted over 2,000 marine species of fish, invertebrate and plants, found in the waters of Belize and now documented in FishBase and SeaLifeBase. I was able to experience first hand some of this incredible diversity and abundance of life with a snorkel through the reef at Hol Chan marine reserve, not far from Turneffe Atoll. A glance around the marine reserve revealed a tremendous array of sharks, rays, turtles, reef fish, dolphins, corals, and much more. Belize has arguably the healthiest Antillean manatee population in the world and still has relatively abundant shark populations, including whale sharks. Looking around as I snorkeled through the reef, I could see that an oil spill in the waters of Belize would have an incredibly devastating effect. A catastrophic oil spill, given recent events in the Gulf of Mexico and other parts of the world, is quite possible. Drilling for oil offshore is much riskier than onshore, and in a biologically rich and diverse marine environment such as Belize, the risks are too high—in my opinion. An oil spill could wipe everything out and Belize would be left with nothing-no tourism, no fishing!

Throughout the conference, Audrey-Matura Sheppard, VP of Oceana Belize, emphasized the importance of the reef in providing food security and jobs, “Think about Belize without the reef? Where would we be without that?”. The Belize barrier reef, the largest barrier reef system in the northern hemisphere and a UNESCO World Heritage Site, is a sense of national pride, a source of livelihoods, food security and jobs for the people of Belize. That is definitely worth protecting!

For more information about marine biodiversity in Belize, the conference and its outputs, visit this website.

1 McCrea-Strub, A. and Pauly, D. (2011) Oil and fisheries in the Gulf of Mexico. Ocean and Coastal Law Journal [in press].

Deep-Sea Fish in Deep Trouble

A team of scientists from around the world, including several members of the Sea Around Us Project, is recommending that most of the deep sea be closed to fishing. In an extensive review paper published in the journal Marine Policy, a team of ecologists, fisheries biologists, economists, and mathematicians make the case that high seas fisheries should be shut down.

Fish from the deep sea, like the Orange roughy shown here (photo credit: Claire Nouvian), make up less than 1% of seafood in the market. But fisheries, especially trawl fisheries, cause a lot of damage to the species themselves as well as the seafloor and animals that live on it, like deep-sea coral, the authors of the paper argue. In addition, high seas trawlers receive an estimated $162 million each year in government handouts, which amounts to 25% the value of the fleet’s catch, according to Rashid Sumaila, an author on the paper and a fisheries economist at UBC.

The study comes just before the United Nations deliberates on deep-sea fisheries on the high seas. In 2006, a proposed UN resolution to ban bottom trawling in the high seas failed due to opposition led by Iceland and Russia.

Read the full press release here, the full study here, and some media coverage in The Washington Post.

Reference: Elliott A. Norse, Sandra Brooke, William W.L. Cheung, Malcolm R. Clark, Ivar Ekeland, Rainer Froese, Kristina M. Gjerde, Richard L. Haedrich, Selina S. Heppell, Telmo Morato, Lance E. Morgan, Daniel Pauly, Rashid Sumaila, Reg Watson. Sustainability of deep-sea fisheries. Marine Policy, 2012; 36 (2): 307.

GOMEX Oil Spill’s Possible Impact on Fisheries

The Deepwater Horizon oil spill impacted a highly productive area of crucial economic significance within the Gulf of Mexico. The first preliminary estimate of the spill’s impact on commercial fisheries was recently published by the Sea Around Us Project, led by post-doctoral fellow Ashley McCrea-Strub. Trends suggest that more than 20% of the average annual U.S. commercial catch in the Gulf has been affected by postspill fisheries closures, indicating a potential minimum loss in annual landed value of US$247 million. Lucrative shrimp, blue crab, menhaden, and oyster fisheries may be at greatest risk of economic losses. Read the full paper here.
Citation: A. McCrea-Strub, K. Kleisner, U. R. Sumaila, W. Swartz, R. Watson, D. Zeller & D. Pauly (2011): Potential Impact of the Deepwater Horizon Oil Spill on Commercial Fisheries in the Gulf of Mexico, Fisheries, 36:7, 332-336.